add workflow dispatch #819

Job	Run time
Ember Tests (14.x, windows-latest)	2m 45s
Ember Tests (16.x, ubuntu-latest)	1m 13s
Ember Tests (16.x, windows-latest)	2m 34s
Test Packages (14.x, ubuntu-latest)	1m 40s
lint-all-packages	44s
Test Packages (16.x, ubuntu-latest)	1m 27s
Test Packages (16.x, windows-latest)	2m 51s
Ember Tests (14.x, ubuntu-latest)	1m 19s
Test Packages (14.x, windows-latest)	2m 56s
Legacy Mocha Tests - 14.x	35s
Legacy Mocha Tests - 16.x	42s
ember-try for ember-cli-fastboot: ember-lts-3.28	1m 10s
ember-try for ember-cli-fastboot: ember-lts-3.20	1m 0s
ember-try for ember-cli-fastboot: ember-lts-3.16	1m 2s
ember-try for ember-cli-fastboot: ember-lts-4.8	1m 7s
ember-try for ember-cli-fastboot: ember-lts-3.24	52s
ember-try for ember-cli-fastboot: ember-release	59s
ember-try for ember-cli-fastboot: ember-canary	1m 16s
ember-try for ember-cli-fastboot: ember-lts-4.4	1m 12s
ember-try for ember-cli-fastboot: ember-beta	1m 17s
ember-try for ember-cli-fastboot: ember-lts-4.12	1m 2s
ember-try for ember-cli-fastboot: ember-release-no-deprecations	1m 9s
discover_matrix	39s
ember-try for ember-cli-fastboot: ember-lts-5.4	1m 3s
ember-try for ember-cli-fastboot: no-deprecations	1m 4s
ember-try for ember-cli-fastboot: embroider-optimized	48s
ember-try for ember-cli-fastboot: embroider-safe	46s
custom-output-paths	34s
ember-cli-fastboot	38s
fastboot-express-middleware	35s
fastboot-config-location	40s
oneerror-per-visit	1m 1s
fastboot-location	43s
integration-tests	1m 19s
fastboot-shoebox-test	39s
root-url	35s
request-details	38s
	42m 34s

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